Radio apparatus



W. J. DALTON RADIO APPARATUS May 12, 1931.

5 Sheets-Sheet l Filed March 5, 1925 lpg I N VEN TOR.

TTORNEY W. J. DALTON RADIO APPARATUS May l2, 1931.

Filed March 5l 1925 5 Sheets-Sheet 2 W. J. DALTON RADIO APPARATUS May 12, 1931.

5 Sheets-Sheet 3 Filed March 5, 1925 INVENTOR Wfdw Jalwz/ May 12, 1931. w. J. DALTON 1,804,676

RADIO APPARATUS Filed March 5, 1925 5 Sheets-Sheet 4 Ji l B BATT,

w. J. DALTON May l2, 1931..

RADIO APPARATUS 5 Sheets-Sheet 5 INVENTOR Miha/72 JaZa/v Filed March 5, 1925 s ATTORNEY Patented May 12, i931 UNITED STATES PATENT OFFICE I WILLIAM J'. DALTON, 0F BRIDGEPOBT, CONNECTICUT, ABSIGNOB. TO COLUMBIA PHONO- GRAPH COMPANY, INC., 0F vEBJEDGEPOBJJ?, CONNECTICUT, 4A CORPORATION4 OF NEW YORK RADIO APPARATUS q Application led March 5, 1925. Serial No. 13,131.

This invention relates to radiant energy, and particularly to 'radio receiving and l1ke -sets adapted to be used either in the home or for carrying about.

A primary object of the inventiony isto provide a radio receiving set which may be mounted in a phonograph cabinetwithout interfering with the operation of the phonograph, and which may be readilv dismounted from the phonograph an conveniently carried from place to place.

Another object is to provide a radioA receiving set which is entirely enclosed ma conveniently handled contalner, for' transportation on camping trips and the llke.'

A further object is to provide a radio receiving set wherein the entire apparatus, including batteries,l an amplifier, and an antenna, is fitted into a cabinet.

An additional object is to provide a radio receiving 'set vfor disposition in arv phonograph cabinet and wherein the antenna surrounds the remainder of the structur. f

Another object is to provide-a portablel radio set wherein the antenna is concealed A further object is to provide a portable radio set wherein an amplifier is disposed in the lid thereof. l

An additional object is to provide -a portable radio set including a lid which, when open, exposes the control dials.

Yet another` object is to provide a portable radio set including a case, the lid of which contains the antenna, and an amplifier which is exposed when the lid is open.

A further object is to provide a soundreproducing machine including a base and a lid wherein the reproducingmeans per se is ermanently located in the lid.

A further object is to provide a portable radio set including a case containing two compartments, onev of which, in one-of itsv longitudinal sectional view taken on thel line 6-6 thereof.

Fig. 7 isa perspective view of a form of loop to` be used wlth the set` when installed in a stationary cabinet, such as shown in Figs. 5 and 6.

8 is a perspective view of the battery box, the same being partly open to disclose its contents in operative position; and

F1g.9 1s a diagrammatic view showing the wiring diagram or hook-up, and the relative arrangement of radio parts.

Referring, in detail, toH the drawings whereln, for the purpose of illustration, an

embodiment of the invention is shown, a.

case or container adapted to comletely enclose a radio set is shown at 1. Figs. 1, 2, 3, and 4.) The case 1 includes a base 2 and a lid 3Yhinged1y connected thereto bya double hinge 4. Base 2 is provided with a plurality of combined vvent and peep holes', 5. each of which is covered with I a wire screen or the like 6. The openings 5 provide for the escape of heat generated within the base during the use of the set.

At each corner of the cabinet 1 there are provided corner plates 7 (Fig. 1) adapted to reinforce and protect the corner construction. Further, the plates 7 are provided with bosses 8 for supporting the fiat surfaces of the cabinet out of contact with the supporting surface. The case, which is of wood, preferably has its outer surface covered with leather or the like 9.

A strap 10,(Figs. 1 and 4) is secured to one longitudinal edge of the case 1 and forms a hand grip by means of which the case and its contents may be carried from place to place. Hinge 4 is disposed at one transverse edge of the case, and the opposite transverse edge carries a fastening means 11 whereby the case may be held closed. The fastening means shown is purely by way of example, and if desired, or found necessary, a lock of any preferred t-y e may be substituted.

)isposed across the inner face of the forward transverse edge of the base 2, adjacent the upper edge thereof, is a strip or ledge 12 (Fig. 2). This ledge supports the forward edge of a dividing anel 13. This panel 13 includes an upper ayer 14 of suitable insulation, such as bakelite, and a lower layer 15 of wood reviously treated with araiiin and resin (half-and-half) to make it impervious to moisture and insulation. These two layers are formed integral to comprise the panel 13, whose objectwill later be fully explained.

The antenna 16 is secured, as by means of tacks 17, to a board 18 which 1s disposed against the inner wall of the lid or closure 3 (Fig. 2). Board 18 is secured to the lid 3 by any suitable means and the tacks 17 are so arranged, relatively, that the antenna 16 is in the form of a series of substantial squares, one within the other. This feature is best shown by the dotted line in Fig.A 3. A board 19 (Fig. 2) is disposed in the lid 3 in a .osition to conceal the antenna. This boar also serves an additional purpose which will later be described.

A base'20 of a horn or amplifier 21 (Figs. 2 and 3) is secured to the board 19 to move therewith and with the lid 3. The amplifier is so .dis sed in the lidI that when the lid is opene the am lifier is moved to operative position. The ase 20 of the'anip ifier is made hollow to receive a sound reproducer 22 of any, oi.' the usual, construction used in connection with the radio receiving sets.

A radio receiving set, including tubes, transformers, -a detector rheostat, condensers, a voltmeter, potentioineters, and a switch, together with the necessary telephone jack, is disposed at the under side of panel 13 and mounted thereon to move therewith (Figs. 2 and 4).l The manipulating portions of the a paratus are disposed at the upper side o the panel when closed. (Figs. 2, 3, and 5). 'Panel 13 is secured to a leaf of -the hinge 4 and may be readily swung into the position shown in Fig, 4 to expose the parts for inspection, repair, replacement and the like.

Of theparts at the under side of the ariel 13, a detector is shown at 23, Fig.y 4, an diagrammatically in Fig. 9, reference being had to both figures. The set has five stages of. amplification, three of audio-fre uency, and two of radio-frequency. As s own, xtwo radio-frequency tubes 24 and three audio-` Two other fixed condensers are provided in circuit with the audio-frequency tubes 25.

An anti-capacity switch is provided at 31, the same being disposed adjacent the hinged end of the panel 13. Also, a detector rheostat 32 is placed in the main circuit and is disposed between the switch 31 and a potentiometer 33 for the radio-frequency tubes. 'lherc is a potentiometer 34 for the circuit in which the audio-frequency tubes are located. Also, a voltmeter 35 is employed, the saine bein readable from the upper side of the pane 13 through a glass 36 (Figs. 3 and 5)( rating knobs 37 and 38, vfor the potentiometers 33 and 34, respectively, are positioned at the upper side of the panel 13, to fprovide for the convenient operation thereo The detector rheostat 32 has an operating handle 39 and a knob and dial 40 and 4l, respectively, are provided for proper and convenient manipulation .of the variable condenser 2S. A plug 42 is inserted into a telephone jack and has leads 43 to the reproducer 22.

)Vires 44 and 45 (Fig. 3) connect the antenna 16 with the'terrninals 46 and 47 which also have connection with the wires 48 and 49 (Fig. 9) at the under side of the panel 13. A pair of wires 50 (Fig. 3) form a connection between the terminals 51 and any A battery. Terminals' 51 have contact with wires 52 (Fig. 9) at the under side of the panel 13.

-The base 2 of the case 1 is lined with a sheet of copper. This lining is represented at 53 and acts as'a eounterpoise, a ground wire beingr shown at 5l. The parts are substantia y enclosed by this lining and the sheet 14 of insulation. In this way, a shield is formed around the operating parts and interference therewith by outside disturbances is prevented. The use of this shield is, of course, optional and is only desirable withcertain sets.

When the lid 3 is closed, the loperating or manipulating parts are enclosed and protecte Also, the horn or amplifier 21 and the microphone 22 willkbe concealed. In

c isposed in the record compartment of thel cabinet. Thev wires being disposed below the surface of the member 56, there is no chance of their being short-circuited or chafed. Furthermore, due to the depth of the loop the set in connection with which the antenna is used will be non-directional.

A and B batteries 58 and 59, respectivel are positioned in a box or receptacle 60 ig. 8) which is positioned within the frame 56 in the cabinet (Fig. 6). The battery box or receptacle 60 includes a body Gland a lid 62 hingedly connected thereto. Body 61 has a plurality of openings or vent holes 63. To provide for the convenient moving about of the battery box, the same is equipped with a strap 64 forming a hand g ffler the battery box 60 is in position as shown in Fi 6, the base 2 of the case l is positioned Within the frame 56 in the cabinet. The batteries 58 and 59, as well as the antenna, are connected with the set in the usual manner.

A wire 65 leads from the switch 31 to a .telephone-receiver 66 which is substituted for the ordinary phonograph reproducen Telephone-receiver 66 is secured to the outer end of the tone-arm 67 by a pin and slotar' rangement, as is common in phonograph manufacture. In this manner, the honograph horn 68 serves as an amplifier or the radio as well as for the phonograph. The` doors 69 of the phonograph 55 are closed inthe usual manner to cover or conceal the manipulating knobs of the radio set'.

When it is desired to use the phonograph mechanism, the telephone-receiver 66 iis detached and an ordinary phonograph reproducer is attached to the tone-arm 67. The -receiver 66 mayagain be readily reattached upony the phonograph reproducer being removed from the tone-arm. Horn 68 serves excellently in its dual capacity as amplifier for the phonographvand radio. Further, the

addition of the radio to the cabinet 55 does v not detract from its appearance.

In addition to` the above, the radio receiving set may be readily dislnounted from the cabinet and a portable set formed. This is a very advantageous arrangement, as a stationary cabinet set is provided for home use and is of such construction that it may read# ily be converted into a portable set for use an open-ended frame non-rotatably mounted on camping trips and the like. The owner of the device will, therefore, have in one set, all the advantages of both a portable and a non-portable set.

When the set is to be used in a cabinet as shown in Figs. 5 and 6, it isbut necessary -the base.

employed, the'operating parts are,not dethe lid 3 may be removed fromthe base.

The base containing-the o erating 'parts/may then be installed in the cab convert the set into a portable, it is but necessary to a ain secure the lid 3 in place on wing to the particular assembly ranged in converting the set from a portable and back again.

The battery box 60, together with the batteries, will be carried along when the set is used as a portable. Owing to the novel arrangement of the batteries in the box 60,

they may be conveniently moved about with inet 55. To again the set and are not apt to have their termina'ls broken, etc. Also, this arrangement provides for the neat and compact placing ofthe parts in the cabinet 55. Moreover, 1t 1s not necessary that two sets of batteries be provided-one for use w`ith the set when 1n the cabinet 55, and another when it is used as a portable.

It will be understood that the only part 4provided in duplicate-in order to provide a portable and a non-portable set in accordance with this invention-is. the loop vantenna. However, this part is lof, small value and the part may be built by unskilled persons at little cost.`

From the foregoing description, taken i-n connection with .the accompanying drawings, it will be readily appreciated by those skilled in the art that many novel features of this invention may be used without the other features. Moreover, the different parts of the invention'may be rearranged by skilled persons and good results obtained. /Therefore, it is to be definitely understood that 'the invention is not "to be considered as-limited by this disclosure, the latter being by Way of illustration and not by way of limitation. For a definition of the limitations of the invention, reference must be had to the annexed claims wherein the invention is defined. l

I claim: v

1. In combination, a cabinet, a radio set, and an open-ended frame non-rotatably mounted within the cabinet including a set supporting base, side walls, and a top wall, and an antenna disposed about the frame and extending substantially throughout its depth, the depth of saidframe substantially approaching its other dimensions 'whereby the antenna is non-directional, said set being disposed within and lsurrounded by said frame and antenna.

2. In combination, cabinet, a radio set, and

within the cabinet including a set supporting base, side walls, and a top wall, and an anten-v other dimensions whereb 'the antenna. is

non-directional, and set being removably disposed within and surrounded by said frame and antenna, and a loud speaker unit permanently mounted in said cabinet.

3. In combination, cabinet, a radio set, and an o en-ended frame non-rotatably mounted within the cabinet including a set supporting base, side wallsland a top wall, an an tenna disposed about the frame and extending substantially throughout itsdepth, the depth of said frame substantially apprqaching its other dimensions whereby the antenna is non-directional, said set being removably disposed within and surrounded by said .frame and antenna, and batteries also disposed within and surrounded by said frame and antenna.

4. In combination, cabinet, a radio set, and an o exi-ended frame non-rotatably mounted within the cabinet including a set supporting base, side walls, and a top wall an antenna disposed about the frame an extending substantially throughout its depth,

the depth of said frame substantially agy t e preaching its other dimensions wher'eb antenna is non-directional, said set being removably disposed within and surrounded by said frame and antenna, and a portable batter carr ing case adapted to contain A an B atteries removably disposed within and surrounded by said frame and antenna.

Si ed at Bridgeport, in the county of l Fair eld, and State of Connecticut, this 16th day of Februar A. D. 1925.

LLIAM J. DALTON. 

